For those not familiar with DockBarX / DockX, here's a quick list of features:

pin applications to the taskbar;

quick access to recent, related and most used documents with the help of Zeitgeist;

Unity quicklists, badges and progress bars support;

DockManager support (so you can use Docky helpers in DockBarX);

Media buttons support (play/pause, etc.);

Highly configurable, both in appearance and functionality (keyboard shortcuts, etc.);

DockX (DockBarX as a stand-alone dock) can be positioned anywhere on the screen, comes with autohide, dodge active window or all windows, can be resized, supports plugins (AppIndicators - doesn't work in GNOME Shell, Cardapio, volume control, clock and namebar - adds window title and buttons to DockX) and more.

Below you can check out a few DockbarX (/Dockx) screenshots:

DockBarX running as an AWN plugin - for how to install AWN in Ubuntu 13.10 or 14.04, see THIS article

DockBarX Xfce panel plugin

The recently added battery indicator

AppIndicators in DockX

Media controls

Install DockBarX 0.91 in Ubuntu

To add the main DockBarX PPA and install the application in Ubuntu (and derivatives), use the following commands: